Attribute Name Spacing

This rule prevents trailing spaces after attribute names, ensuring compatibility with Swift 6 where a space between an attribute name and the opening parenthesis results in a compilation error (e.g. @MyPropertyWrapper (), private (set)).

• Identifier: attribute_name_spacing
• Enabled by default: Yes
• Supports autocorrection: Yes
• Kind: style
• Analyzer rule: No
• Minimum Swift compiler version: 5.0.0
• Default configuration:

  Key	Value
  severity	error

Non Triggering Examples

private(set) var foo: Bool = false

fileprivate(set) var foo: Bool = false

@MainActor class Foo {}

func funcWithEscapingClosure(_ x: @escaping () -> Int) {}

@available(*, deprecated)

@MyPropertyWrapper(param: 2) 

nonisolated(unsafe) var _value: X?

@testable import SwiftLintCore

func func_type_attribute_with_space(x: @convention(c) () -> Int) {}

@propertyWrapper
struct MyPropertyWrapper {
    var wrappedValue: Int = 1

    init(param: Int) {}
}

let closure2 = { @MainActor
  (a: Int, b: Int) in
}

Triggering Examples

private ↓(set) var foo: Bool = false

fileprivate ↓(set) var foo: Bool = false

public ↓(set) var foo: Bool = false

  public  ↓(set) var foo: Bool = false

@ ↓MainActor class Foo {}

func funcWithEscapingClosure(_ x: @ ↓escaping () -> Int) {}

func funcWithEscapingClosure(_ x: @escaping↓() -> Int) {}

@available ↓(*, deprecated)

@MyPropertyWrapper ↓(param: 2) 

nonisolated ↓(unsafe) var _value: X?

@MyProperty ↓() class Foo {}

let closure1 = { @MainActor ↓(a, b) in
}